B3311331313231311331322331333132333133313132233133313232233131232313221   >>    B331133131323131133132233133313233313331313223313331323223313123231322   <<    B3311331313231311331322331333132333133313132233133313232233131232313223   >>      B3311331313231311331322331333132333133313132233133313232233131232313222   >>